Speaker for an automobile



FIG. 1 is a perspective view of a speaker for an automobile showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a right side view thereof.

The broken lines depict portions of the speaker for an automobile that form no part of the claimed design. 

CLAIM The ornamental design for a speaker for an automobile, as shown and described. 